Tools & Wizards About Us

Report Summary

  • 53

    Performance

    Renders faster than
    70% of other websites

  • 71

    Accessibility

    Visual factors better than
    that of 36% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 81

    SEO

    Google-friendlier than
    42% of websites

rainbowdoubleglazing.co.uk

Double Glazed Windows, Doors & Conservatories in Berkshire, UK | Rainbow Double Glazing

Page Load Speed

4.5 sec in total

First Response

189 ms

Resources Loaded

3.9 sec

Page Rendered

326 ms

About Website

Click here to check amazing Rainbow Double Glazing content. Otherwise, check out these important facts you probably never knew about rainbowdoubleglazing.co.uk

Rainbow Double Glazing are your leading installer of uPVC window, doors & conservatories covering Berkshire, UK. Call 0800 0264 642.

Visit rainbowdoubleglazing.co.uk

Key Findings

We analyzed Rainbowdoubleglazing.co.uk page load time and found that the first response time was 189 ms and then it took 4.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

rainbowdoubleglazing.co.uk performance score

53

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.4 s

38/100

10%

LCP (Largest Contentful Paint)

Value4.7 s

32/100

25%

SI (Speed Index)

Value6.8 s

34/100

10%

TBT (Total Blocking Time)

Value90 ms

99/100

30%

CLS (Cumulative Layout Shift)

Value1.144

1/100

15%

TTI (Time to Interactive)

Value4.4 s

84/100

10%

Network Requests Diagram

rainbowdoubleglazing.co.uk

189 ms

www.rainbowdoubleglazing.co.uk

1511 ms

css

19 ms

css

36 ms

styles.css

181 ms

Our browser made a total of 43 requests to load all elements on the main page. We found that 93% of them (40 requests) were addressed to the original Rainbowdoubleglazing.co.uk, 5% (2 requests) were made to Fonts.googleapis.com and 2% (1 request) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (1.9 sec) belongs to the original domain Rainbowdoubleglazing.co.uk.

Page Optimization Overview & Recommendations

Page size can be reduced by 180.2 kB (6%)

Content Size

3.2 MB

After Optimization

3.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Rainbowdoubleglazing.co.uk main page is 3.2 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 55% of websites need less resources to load. Images take 3.1 MB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 57.8 kB

  • Original 71.6 kB
  • After minification 56.9 kB
  • After compression 13.8 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 14.7 kB, which is 20% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 57.8 kB or 81% of the original size.

Image Optimization

-3%

Potential reduce by 93.4 kB

  • Original 3.1 MB
  • After minification 3.0 MB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Rainbow Double Glazing images are well optimized though.

JavaScript Optimization

-25%

Potential reduce by 16.8 kB

  • Original 68.0 kB
  • After minification 68.0 kB
  • After compression 51.2 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 16.8 kB or 25% of the original size.

CSS Optimization

-49%

Potential reduce by 12.2 kB

  • Original 24.9 kB
  • After minification 24.9 kB
  • After compression 12.7 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Rainbowdoubleglazing.co.uk needs all CSS files to be minified and compressed as it can save up to 12.2 kB or 49% of the original size.

Requests Breakdown

Number of requests can be reduced by 20 (50%)

Requests Now

40

After Optimization

20

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 40 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Rainbow Double Glazing. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

rainbowdoubleglazing.co.uk accessibility score

71

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best Practices

rainbowdoubleglazing.co.uk best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

rainbowdoubleglazing.co.uk SEO score

81

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Rainbowdoubleglazing.co.uk can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Rainbowdoubleglazing.co.uk main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

Open Graph description is not detected on the main page of Rainbow Double Glazing. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: